Github user koertkuipers closed the pull request at:
https://github.com/apache/spark/pull/16889
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GitHub user koertkuipers opened a pull request:
https://github.com/apache/spark/pull/16889
[SPARK-17668][SQL] Use Expressions for conversions to/from user types in
UDFs
## What changes were proposed in this pull request?
do not merge
this is a first attempt at trying
